Oracle Oracle Certifications 1Z0-460 Questions & Answers

• Question 51:

  You have successfully installed the uptrack tool on servers you will be using ksplice kernel updates. Which two options are correct descriptions of commands you can run?

  A. "uptrack-show": list the active Oracle Ksplice updates in your running kernel.

  B. "uptrack-upgrade": connect to the Uptrack update server, check and apply new updates when available.

  C. "uptrack-upgrade": connect to the Uptrack update server, check and download a new update to the uptrack tool.

  D. "uptrack-show ": list the servers that have the uptrack tool installed using the current key.

  Correct Answer: AB

  A: uptrack-show

  You can see what updates have been installed by running uptrack-show:

  B: uptrack-upgrade

  Ksplice updates are the same security and bugfix updates you would get from your Linux vendor, packaged in a special rebootless form. To apply Ksplice updates, just run uptrack- upgrade.

• Question 52:

  Which two features are available with the Unbreakable kernel R2, but not with the Red Hat Compatible Kernel?

  A. Oracle Clusterware for Linux

  B. Up to 4-petabyte cluster volumes with OCFS2

  C. Ksplice zero downtime patching

  D. Transparent Huge Pages support (that is, 2 MB instead of 4 KB)

  Correct Answer: AB

  Oracle's Unbreakable Enterprise Kernel KEY FEATURES:

  *

  Modern kernel based on 2.6.32, optimized by Oracle for server deployments

  *

  Includes OCFS (Oracle Cluster File System)2 1.6 for clustered volumes

  *

  Includes OFED 1.5.1

  *

  Advanced NUMA support

  *

  New diagnostic and tracing tools, including performance counters

  *

  Complete data integrity checking from application to disk

  *

  Hardware fault management

• Question 53:

  Identify three valid modes for SELinux.

  A. Disabled

  B. Enforcing

  C. Running

  D. Permissive

  E. Enabled

  F. High_level

  G. Label_only

  Correct Answer: ABD

  SELinux has three modes:

  Enforcing: SELinux policy is enforced. SELinux denies access based on SELinux policy rules. Permissive:

  SELinux policy is not enforced. SELinux does not deny access, but denials are logged for actions that

  would have been denied if running in enforcing mode. Disabled: SELinux is disabled. Only DAC rules are

  used.

• Question 54:

  Which three statements describe the Unbreakable Enterprise Kernel (UEK)?

  A. The UEK contains proprietary Linux Kernel enhancements only available to Oracle Linux.

  B. The UEK is available for x86 (32 bit), x86-64 (64 bit), ARM 32 bit, and ARM 64 bit servers.

  C. Existing applications run unchanged with the UEK in place because all system libraries remain unchanged.

  D. The UEK has more recent kernel enhancements for features like power management than the Red Hat Compatible Kernel.

  E. The UEK has ASMlib included by default.

  Correct Answer: ACE

  A: The Unbreakable Enterprise Kernel Release 2 is Oracle's second major release of its heavily tested and optimized operating system kernel for Oracle Linux 5 and Oracle Linux 6.

  C: Oracle claims that the Unbreakable Enterprise Kernel is compatible with RHEL, and Oracle middleware and third-party RHEL-certified applications can be installed and run unchanged on Unbreakable Enterprise Kernel.

  E: Oracle ASMlib is included by default

  Incorrect:

  Not B: Unbreakable Enterprise Kernel is available for x86-64 servers.

• Question 55:

  Examine the following commands: # groupadd project # mkdir /usr/share/project # chown R root.project /usr/share/project # qpasswd a scott project # qpasswd a foo project # chmod 2775 /usr/share/project

  Based on the commands, which statement is correct?

  A. Any new file created in the /usr/share/project folder by user scott will not be possible for foo to modify it.

  B. All members of the project group need the administrator's help to change the file permission every time users write new files in the /usr/share/project folder.

  C. Files created by all members of the project group in the /usr/share/project folder will get the same group permission as the folder itself.

  D. The chmod command can only take a tree-digit argument.

  Correct Answer: A

  * A permission of "2755" for a directory means that everyone has read and execute permission, while the

  file owner and members of the file's group additionally have write permission. And any files or

  subdirectories created in that directory will inherit the parent directory's group id.

  Incorrect:

  Not D: chmod 2775 is a valid command.

• Question 56:

  You have to find the default runlevel of your Oracle Linux system. Which file will help you find this information?

  A. /boot/grub/grub.conf

  B. /etc/inittab

  C. /etc/rc.d/rc.sysinit

  D. /etc/rc.local

  E. /etc/rc.d/init.d

  Correct Answer: B

  The default run level is specified in the /etc/inittab file.

• Question 57:

  You have to mount the Oracle Linux ISO image file OracleLinux R6 U2 Server X86_64- dvd.iso to the / media/cdrom mount point. Which command will help you mount the Oracle Linux ISO image file?

  A. # mount OracleLinux R6 U2 Server X86_64-dvd.iso /media/cdrom

  B. # mount t DVD OracleLinux R6 U2-Server-X86_64-DVD.iso/media/cdrom

  C. # mount /dvd/OracleLinux -R6 -U2- Server=X86_64-dvd.iso /media/cdrom/OracleLinux-R6- UI-ServerX86_64-dvd.iso

  D. # mount 0 ro, loop oracleLinux R6 U2 Server X86_64 dvd.iso /media/cdrom

  Correct Answer: D

  Mount the DVD iso of the desired update of Oracle Linux Release 5. Use the following command for mounting the DVD media inserted in /dev/cdrom

  # mount -r -o loop -t iso9660 /dev/cdrom /mnt

  Use following command to mount iso image file

  # mount -o loop /mnt

• Question 58:

  View the output below. As oracle user, you run the following command on your Oracle Linux 6 system:

  [oracle@dbhost ~ ] $

  [oracle@dbhost ~] $ nice - - 10 ./myscript.sh and

  [1] 2735 [oracle@dbhost ~] $ nice: cannot set niceness: permission denied

  Why is the nice command failing?

  A. Shell scripts cannot be assigned a negative nice value.

  B. There is already another process running with same niceness value on this system.

  C. A negative nice value can be set by the root user.

  D. A nice value of -10 is not the permissible niceness range.

  Correct Answer: C

  Only a privileged user may run a process with lower niceness: $ nice -n -1 nice nice: cannot set niceness: Permission denied $ sudo nice -n -1 nice Note: Sudo stands for either "substitute user do" or "super user do" (depending upon how you want to look at it). What sudo does is incredibly important and crucial to many Linux distributions. Effectively, sudo allows a user to run a program as another user (most often the root user).

• Question 59:

  Identify the Oracle-supported source for obtaining Oracle Linux

  A. From any good Linux distribution

  B. From Oracle's eDelivery software delivery cloud

  C. From Oracle Metalink Support

  D. From Linux vendors such as Red Hat or SUSE

  E. From Anaconda Installer

  Correct Answer: B

  * Oracle Software Delivery Cloud. Here you can find downloads for the Oracle Linux Operating System, Oracle VM, and Oracle VM Templates for both Linux and Solaris.

• Question 60:

  Which two options can be completed when using the Firewall Configuration Tool, system config firewall?

  A. Write complex firewall rules for checking, logging, and rejecting inbound and outbound connections

  B. Enabling or disabling the firewall entirely

  C. Build a filter to obfuscate sensitive data (national ID numbers, Credit Cards, and so on)

  D. Select the services that have access to the network resource

  Correct Answer: BC

  system-config-firewall

  The GUI screen to control the firewall is available from the menu (System > Administration > Firewall) or

  can be started from the command line using the system-config-firewall command.

  Once started, the toolbar provides buttons to allow the firewall to be enabled/disabled (B). You can also configure basic trusted services, such as SSH, FTP and HTTP (C), by putting a tick in the appropriate checkbox and clicking the "Apply" button on the toolbar.

  

  The "Other Ports" section allows you to open ports that are not covered in the "Trusted Services" section.